Download PDF by Jay A. Farrell, Marios M. Polycarpou: Adaptive approximation based control: unifying neural, fuzzy

By Jay A. Farrell, Marios M. Polycarpou

ISBN-10: 0471727881

ISBN-13: 9780471727880

A hugely available and unified method of the layout and research of clever regulate platforms Adaptive Approximation dependent keep an eye on is a device each regulate dressmaker must have in his or her keep an eye on toolbox. blending approximation concept, parameter estimation, and suggestions keep watch over, this booklet provides a unified process designed to allow readers to use adaptive approximation established regulate to current platforms, and, extra importantly, to realize sufficient instinct and realizing to govern and mix it with different keep an eye on instruments for purposes that experience no longer been encountered sooner than. The authors offer readers with a thought-provoking framework for conscientiously contemplating such questions as: * What houses should still the functionality approximator have? * Are yes households of approximators more advantageous to others? * Can the soundness and the convergence of the approximator parameters be assured? * Can regulate structures be designed to be strong within the face of noise, disturbances, and unmodeled results? * Can this process deal with major adjustments within the dynamics as a result of such disruptions as approach failure? * What varieties of nonlinear dynamic platforms are amenable to this strategy? * What are the restrictions of adaptive approximation dependent keep an eye on? Combining theoretical formula and layout recommendations with large use of simulation examples, this e-book is a stimulating textual content for researchers and graduate scholars and a helpful source for working towards engineers.

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Extra info for Adaptive approximation based control: unifying neural, fuzzy and traditional adaptive approximation approaches

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I), . . The matrix QT is referred to as the interpolation or collocation matrix. Much of the function approximation and interpolation literature focuses on the case where n = 1. When n > 1 and the data points are not defined on a grid, the problem is referred to as scattered data interpolation . A necessary condition for interpolation to be possible is that N 2 m. , z k = z ( k T ) ) ,interpolation would eventually lead to both memory and computational problems. If N = m and CP is nonsingular, the unique interpolated solution is 8 = (aT)-lY = Q,-TY.

Various methods including least squares and gradient descent (back-propagation) are derived and analyzed. Chapters 6 and 7 discuss the issues related to parameter estimation in the context of feedback control applications. Chapter 6 presents a detailed analysis of the issues related to stability of the state and parameter estimates. 6 as well as in Chapter 7. 5 DISCUSSION AND PHILOSOPHICAL COMMENTS The objective of adaptive approximation-based control methods is to achieve a higher level of control system performance than could be achieved based on the n pviori model information.

4 APPROXIMATOR PROPERTIES This section discusses properties that families of function approximators may have. In each subsection, the technical meaning of each property is presented and the relevance and tradeoffs of the property in the applications of interest are discussed. Due to the technical nature of and the broad background that would be required for the proofs, in most cases the proofs are not presented. Literature sources for the proofs are cited. 1 Parameter (Non)Linearity An initial decision that the designer must make is the form of the function approximator.

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Adaptive approximation based control: unifying neural, fuzzy and traditional adaptive approximation approaches by Jay A. Farrell, Marios M. Polycarpou

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